Hello, I have a 20 year old technics amplifier SA-R230L, it’s in very good shape, but most times when I switch it on I hear the relay click, the standby lamps goes off, the lights on the equalizer go on, but it is not turning on. All other lights stay off and the unit stays off. Sometimes after about 15 minutes it switches on all by itself. Anybody with an idea? Thanks from eastwest.